package com.ngds.library.downloadcenter;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;

import java.io.File;

/**
 * FileOpenHelper
 * Description:用于调用系统工具打开各式文件
 * Author:lix
 * Date :14-2-24
 */
public class FileOpenHelper {
    private static final String[][] MIME_MapTable = {
        //{后缀名， MIME类型}
        {".3gp", "video/3gpp"},
        {".apk", "application/vnd.android.package-archive"},
        {".asf", "video/x-ms-asf"},
        {".avi", "video/x-msvideo"},
        {".bin", "application/octet-stream"},
        {".bmp", "image/bmp"},
        {".c", "text/plain"},
        {".class", "application/octet-stream"},
        {".conf", "text/plain"},
        {".cpp", "text/plain"},
        {".doc", "application/msword"},
        {".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
        {".xls", "application/vnd.ms-excel"},
        {".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
        {".exe", "application/octet-stream"},
        {".gif", "image/gif"},
        {".gtar", "application/x-gtar"},
        {".gz", "application/x-gzip"},
        {".h", "text/plain"},
        {".htm", "text/html"},
        {".html", "text/html"},
        {".jar", "application/java-archive"},
        {".java", "text/plain"},
        {".jpeg", "image/jpeg"},
        {".jpg", "image/jpeg"},
        {".js", "application/x-javascript"},
        {".log", "text/plain"},
        {".m3u", "audio/x-mpegurl"},
        {".m4a", "audio/mp4a-latm"},
        {".m4b", "audio/mp4a-latm"},
        {".m4p", "audio/mp4a-latm"},
        {".m4u", "video/vnd.mpegurl"},
        {".m4v", "video/x-m4v"},
        {".mov", "video/quicktime"},
        {".mp2", "audio/x-mpeg"},
        {".mp3", "audio/x-mpeg"},
        {".mp4", "video/mp4"},
        {".mpc", "application/vnd.mpohun.certificate"},
        {".mpe", "video/mpeg"},
        {".mpeg", "video/mpeg"},
        {".mpg", "video/mpeg"},
        {".mpg4", "video/mp4"},
        {".mpga", "audio/mpeg"},
        {".msg", "application/vnd.ms-outlook"},
        {".ogg", "audio/ogg"},
        {".pdf", "application/pdf"},
        {".png", "image/png"},
        {".pps", "application/vnd.ms-powerpoint"},
        {".ppt", "application/vnd.ms-powerpoint"},
        {".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
        {".prop", "text/plain"},
        {".rc", "text/plain"},
        {".rmvb", "audio/x-pn-realaudio"},
        {".rtf", "application/rtf"},
        {".sh", "text/plain"},
        {".tar", "application/x-tar"},
        {".tgz", "application/x-compressed"},
        {".txt", "text/plain"},
        {".wav", "audio/x-wav"},
        {".wma", "audio/x-ms-wma"},
        {".wmv", "audio/x-ms-wmv"},
        {".wps", "application/vnd.ms-works"},
        {".xml", "text/plain"},
        {".z", "application/x-compress"},
        {".zip", "application/x-zip-compressed"},
        {"", "*/*"}
    };


    /**
     * 打开文件
     *
     * @param file
     */
    public static void openFile(File file, Context context) {

        Intent intent = new Intent();
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        //设置intent的Action属性
        intent.setAction(Intent.ACTION_VIEW);
        //获取文件file的MIME类型
        String type = getMIMEType(file);
        //设置intent的data和Type属性。
        intent.setDataAndType(/*uri*/Uri.fromFile(file), type);
        //跳转
        context.startActivity(intent);

    }

    /**
     * 根据文件后缀名获得对应的MIME类型。
     *
     * @param file
     */
    private static String getMIMEType(File file) {

        String type = "*/*";
        String fName = file.getName();
        //获取后缀名前的分隔符"."在fName中的位置。
        int dotIndex = fName.lastIndexOf(".");
        if (dotIndex < 0) {
            return type;
        }
    /* 获取文件的后缀名 */
        String end = fName.substring(dotIndex, fName.length()).toLowerCase();
        if (end == "") {
            return type;
        }
        //在MIME和文件类型的匹配表中找到对应的MIME类型。
        for (int i = 0;
             i < MIME_MapTable.length; i++) { //MIME_MapTable??在这里你一定有疑问，这个MIME_MapTable是什么？
            if (end.equals(MIME_MapTable[i][0])) {
                type = MIME_MapTable[i][1];
            }
        }
        return type;
    }
}
